libmpdemux/demux_avi.c

   1 //  AVI file parser for DEMUXER v2.9  by A'rpi/ESP-team
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6
   7 #include "config.h"
   8 #include "mp_msg.h"
   9 #include "help_mp.h"
  10
  11 #include "stream/stream.h"
  12 #include "demuxer.h"
  13 #include "stheader.h"
  14
  15 #include "aviheader.h"
  16
  17 extern demuxer_t* init_avi_with_ogg(demuxer_t* demuxer);
  18 extern int demux_ogg_open(demuxer_t* demuxer);
  19
  20 extern const demuxer_desc_t demuxer_desc_avi_ni;
  21 extern const demuxer_desc_t demuxer_desc_avi_nini;
  22
  23 // PTS:  0=interleaved  1=BPS-based
  24 int pts_from_bps=1;
  25
  26 // Select ds from ID
  27 static demux_stream_t* demux_avi_select_stream(demuxer_t *demux,
  28                                                unsigned int id)
  29 {
  30   int stream_id=avi_stream_id(id);
  31
  32
  33   if(demux->video->id==-1)
  34     if(demux->v_streams[stream_id])
  35         demux->video->id=stream_id;
  36
  37   if(demux->audio->id==-1)
  38     if(demux->a_streams[stream_id])
  39         demux->audio->id=stream_id;
  40
  41   if(stream_id==demux->audio->id){
  42       if(!demux->audio->sh){
  43         sh_audio_t* sh;
  44         avi_priv_t *priv=demux->priv;
  45         sh=demux->audio->sh=demux->a_streams[stream_id];
  46         mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected AVI audio ID = %d\n",demux->audio->id);
  47         if(sh->wf){
  48           priv->audio_block_size=sh->wf->nBlockAlign;
  49           if(!priv->audio_block_size){
  50             // for PCM audio we can calculate the blocksize:
  51             if(sh->format==1)
  52                 priv->audio_block_size=sh->wf->nChannels*(sh->wf->wBitsPerSample/8);
  53             else
  54                 priv->audio_block_size=1; // hope the best...
  55           } else {
  56             // workaround old mencoder's bug:
  57             if(sh->audio.dwSampleSize==1 && sh->audio.dwScale==1 &&
  58                (sh->wf->nBlockAlign==1152 || sh->wf->nBlockAlign==576)){
  59                 mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_WorkAroundBlockAlignHeaderBug);
  60                 priv->audio_block_size=1;
  61             }
  62           }
  63         } else {
  64           priv->audio_block_size=sh->audio.dwSampleSize;
  65         }
  66       }
  67       return demux->audio;
  68   }
  69   if(stream_id==demux->video->id){
  70       if(!demux->video->sh){
  71         demux->video->sh=demux->v_streams[stream_id];
  72         mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected AVI video ID = %d\n",demux->video->id);
  73       }
  74       return demux->video;
  75   }
  76   if(id!=mmioFOURCC('J','U','N','K')){
  77      // unknown
  78      mp_msg(MSGT_DEMUX,MSGL_DBG2,"Unknown chunk: %.4s (%X)\n",(char *) &id,id);
  79      //abort();
  80   }
  81   return NULL;
  82 }
  83
  84 static int valid_fourcc(unsigned int id){
  85     static const char valid[] = "0123456789abcdefghijklmnopqrstuvwxyz"
  86                                 "ABCDEFGHIJKLMNOPQRSTUVWXYZ_";
  87     unsigned char* fcc=(unsigned char*)(&id);
  88     return strchr(valid, fcc[0]) && strchr(valid, fcc[1]) &&
  89            strchr(valid, fcc[2]) && strchr(valid, fcc[3]);
  90 }
  91
  92 static int choose_chunk_len(unsigned int len1,unsigned int len2){
  93     // len1 has a bit more priority than len2. len1!=len2
  94     // Note: this is a first-idea-logic, may be wrong. comments welcomed.
  95
  96     // prefer small frames rather than 0
  97     if(!len1) return (len2>0x80000) ? len1 : len2;
  98     if(!len2) return (len1>0x100000) ? len2 : len1;
  99
 100     // choose the smaller value:
 101     return (len1<len2)? len1 : len2;
 102 }
 103
 104 static int demux_avi_read_packet(demuxer_t *demux,demux_stream_t *ds,unsigned int id,unsigned int len,int idxpos,int flags){
 105   avi_priv_t *priv=demux->priv;
 106   int skip;
 107   float pts=0;
 108
 109   mp_dbg(MSGT_DEMUX,MSGL_DBG3,"demux_avi.read_packet: %X\n",id);
 110
 111   if(ds==demux->audio){
 112       if(priv->pts_corrected==0){
 113           if(priv->pts_has_video){
 114               // we have video pts now
 115               float delay=0;
 116               if(((sh_audio_t*)(ds->sh))->wf->nAvgBytesPerSec)
 117                   delay=(float)priv->pts_corr_bytes/((sh_audio_t*)(ds->sh))->wf->nAvgBytesPerSec;
 118               mp_msg(MSGT_DEMUX,MSGL_V,"XXX initial  v_pts=%5.3f  a_pos=%d (%5.3f) \n",priv->avi_audio_pts,priv->pts_corr_bytes,delay);
 119               //priv->pts_correction=-priv->avi_audio_pts+delay;
 120               priv->pts_correction=delay-priv->avi_audio_pts;
 121               priv->avi_audio_pts+=priv->pts_correction;
 122               priv->pts_corrected=1;
 123           } else
 124               priv->pts_corr_bytes+=len;
 125       }
 126       if(pts_from_bps){
 127           pts = priv->audio_block_no *
 128             (float)((sh_audio_t*)demux->audio->sh)->audio.dwScale /
 129             (float)((sh_audio_t*)demux->audio->sh)->audio.dwRate;
 130       } else
 131           pts=priv->avi_audio_pts; //+priv->pts_correction;
 132       priv->avi_audio_pts=0;
 133       // update blockcount:
 134       priv->audio_block_no+=priv->audio_block_size ?
 135         ((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
 136   } else
 137   if(ds==demux->video){
 138      // video
 139      if(priv->skip_video_frames>0){
 140        // drop frame (seeking)
 141        --priv->skip_video_frames;
 142        ds=NULL;
 143      }
 144
 145      pts = priv->avi_video_pts = priv->video_pack_no *
 146          (float)((sh_video_t*)demux->video->sh)->video.dwScale /
 147          (float)((sh_video_t*)demux->video->sh)->video.dwRate;
 148
 149      priv->avi_audio_pts=priv->avi_video_pts+priv->pts_correction;
 150      priv->pts_has_video=1;
 151
 152      if(ds) ++priv->video_pack_no;
 153
 154   }
 155
 156   skip=(len+1)&(~1); // total bytes in this chunk
 157
 158   if(ds){
 159     mp_dbg(MSGT_DEMUX,MSGL_DBG2,"DEMUX_AVI: Read %d data bytes from packet %04X\n",len,id);
 160     ds_read_packet(ds,demux->stream,len,pts,idxpos,flags);
 161     skip-=len;
 162   }
 163   if(skip){
 164     mp_dbg(MSGT_DEMUX,MSGL_DBG2,"DEMUX_AVI: Skipping %d bytes from packet %04X\n",skip,id);
 165     stream_skip(demux->stream,skip);
 166   }
 167   return ds?1:0;
 168 }
 169
 170 // return value:
 171 //     0 = EOF or no stream found
 172 //     1 = successfully read a packet
 173 static int demux_avi_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
 174 avi_priv_t *priv=demux->priv;
 175 unsigned int id=0;
 176 unsigned int len;
 177 int ret=0;
 178 demux_stream_t *ds;
 179
 180 do{
 181   int flags=1;
 182   AVIINDEXENTRY *idx=NULL;
 183   if(priv->idx_size>0 && priv->idx_pos<priv->idx_size){
 184     off_t pos;
 185
 186     idx=&((AVIINDEXENTRY *)priv->idx)[priv->idx_pos++];
 187
 188     if(idx->dwFlags&AVIIF_LIST){
 189       // LIST
 190       continue;
 191     }
 192     if(!demux_avi_select_stream(demux,idx->ckid)){
 193       mp_dbg(MSGT_DEMUX,MSGL_DBG3,"Skip chunk %.4s (0x%X)  \n",(char *)&idx->ckid,(unsigned int)idx->ckid);
 194       continue; // skip this chunk
 195     }
 196
 197     pos = (off_t)priv->idx_offset+AVI_IDX_OFFSET(idx);
 198     if((pos<demux->movi_start || pos>=demux->movi_end) && (demux->movi_end>demux->movi_start) && (demux->stream->flags & STREAM_SEEK)){
 199       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkOffset out of range!   idx=0x%"PRIX64"  \n",(int64_t)pos);
 200       continue;
 201     }
 202     stream_seek(demux->stream,pos);
 203     demux->filepos=stream_tell(demux->stream);
 204     id=stream_read_dword_le(demux->stream);
 205     if(stream_eof(demux->stream)) return 0; // EOF!
 206
 207     if(id!=idx->ckid){
 208       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkID mismatch! raw=%.4s idx=%.4s  \n",(char *)&id,(char *)&idx->ckid);
 209       if(valid_fourcc(idx->ckid))
 210           id=idx->ckid; // use index if valid
 211       else
 212           if(!valid_fourcc(id)) continue; // drop chunk if both id and idx bad
 213     }
 214     len=stream_read_dword_le(demux->stream);
 215     if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
 216       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkSize mismatch! raw=%d idx=%d  \n",len,idx->dwChunkLength);
 217       if(len>0x200000 && idx->dwChunkLength>0x200000) continue; // both values bad :(
 218       len=choose_chunk_len(idx->dwChunkLength,len);
 219     }
 220     if(!(idx->dwFlags&AVIIF_KEYFRAME)) flags=0;
 221   } else {
 222     demux->filepos=stream_tell(demux->stream);
 223     if(demux->filepos>=demux->movi_end && demux->movi_end>demux->movi_start && (demux->stream->flags & STREAM_SEEK)){
 224           demux->stream->eof=1;
 225           return 0;
 226     }
 227     id=stream_read_dword_le(demux->stream);
 228     len=stream_read_dword_le(demux->stream);
 229     if(stream_eof(demux->stream)) return 0; // EOF!
 230
 231     if(id==mmioFOURCC('L','I','S','T') || id==mmioFOURCC('R', 'I', 'F', 'F')){
 232       id=stream_read_dword_le(demux->stream); // list or RIFF type
 233       continue;
 234     }
 235   }
 236
 237   ds=demux_avi_select_stream(demux,id);
 238   if(ds)
 239     if(ds->packs+1>=MAX_PACKS || ds->bytes+len>=MAX_PACK_BYTES){
 240         // this packet will cause a buffer overflow, switch to -ni mode!!!
 241         mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_SwitchToNi);
 242         if(priv->idx_size>0){
 243             // has index
 244             demux->type=DEMUXER_TYPE_AVI_NI;
 245             demux->desc=&demuxer_desc_avi_ni;
 246             --priv->idx_pos; // hack
 247         } else {
 248             // no index
 249             demux->type=DEMUXER_TYPE_AVI_NINI;
 250             demux->desc=&demuxer_desc_avi_nini;
 251             priv->idx_pos=demux->filepos; // hack
 252         }
 253         priv->idx_pos_v=priv->idx_pos_a=priv->idx_pos;
 254         // quit now, we can't even (no enough buffer memory) read this packet :(
 255         return -1;
 256     }
 257
 258   ret=demux_avi_read_packet(demux,ds,id,len,priv->idx_pos-1,flags);
 259 } while(ret!=1);
 260   return 1;
 261 }
 262
 263
 264 // return value:
 265 //     0 = EOF or no stream found
 266 //     1 = successfully read a packet
 267 static int demux_avi_fill_buffer_ni(demuxer_t *demux,demux_stream_t* ds){
 268 avi_priv_t *priv=demux->priv;
 269 unsigned int id=0;
 270 unsigned int len;
 271 int ret=0;
 272
 273 do{
 274   int flags=1;
 275   AVIINDEXENTRY *idx=NULL;
 276   int idx_pos=0;
 277   demux->filepos=stream_tell(demux->stream);
 278
 279   if(ds==demux->video) idx_pos=priv->idx_pos_v++; else
 280   if(ds==demux->audio) idx_pos=priv->idx_pos_a++; else
 281                        idx_pos=priv->idx_pos++;
 282
 283   if(priv->idx_size>0 && idx_pos<priv->idx_size){
 284     off_t pos;
 285     idx=&((AVIINDEXENTRY *)priv->idx)[idx_pos];
 286
 287     if(idx->dwFlags&AVIIF_LIST){
 288       // LIST
 289       continue;
 290     }
 291     if(ds && demux_avi_select_stream(demux,idx->ckid)!=ds){
 292       mp_dbg(MSGT_DEMUX,MSGL_DBG3,"Skip chunk %.4s (0x%X)  \n",(char *)&idx->ckid,(unsigned int)idx->ckid);
 293       continue; // skip this chunk
 294     }
 295
 296     pos = priv->idx_offset+AVI_IDX_OFFSET(idx);
 297     if((pos<demux->movi_start || pos>=demux->movi_end) && (demux->movi_end>demux->movi_start)){
 298       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkOffset out of range!  current=0x%"PRIX64"  idx=0x%"PRIX64"  \n",(int64_t)demux->filepos,(int64_t)pos);
 299       continue;
 300     }
 301     stream_seek(demux->stream,pos);
 302
 303     id=stream_read_dword_le(demux->stream);
 304
 305     if(stream_eof(demux->stream)) return 0;
 306
 307     if(id!=idx->ckid){
 308       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkID mismatch! raw=%.4s idx=%.4s  \n",(char *)&id,(char *)&idx->ckid);
 309       if(valid_fourcc(idx->ckid))
 310           id=idx->ckid; // use index if valid
 311       else
 312           if(!valid_fourcc(id)) continue; // drop chunk if both id and idx bad
 313     }
 314     len=stream_read_dword_le(demux->stream);
 315     if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
 316       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkSize mismatch! raw=%d idx=%d  \n",len,idx->dwChunkLength);
 317       if(len>0x200000 && idx->dwChunkLength>0x200000) continue; // both values bad :(
 318       len=choose_chunk_len(idx->dwChunkLength,len);
 319     }
 320     if(!(idx->dwFlags&AVIIF_KEYFRAME)) flags=0;
 321   } else return 0;
 322   ret=demux_avi_read_packet(demux,demux_avi_select_stream(demux,id),id,len,idx_pos,flags);
 323 } while(ret!=1);
 324   return 1;
 325 }
 326
 327
 328 // return value:
 329 //     0 = EOF or no stream found
 330 //     1 = successfully read a packet
 331 static int demux_avi_fill_buffer_nini(demuxer_t *demux,demux_stream_t* ds){
 332 avi_priv_t *priv=demux->priv;
 333 unsigned int id=0;
 334 unsigned int len;
 335 int ret=0;
 336 off_t *fpos=NULL;
 337
 338   if(ds==demux->video) fpos=&priv->idx_pos_v; else
 339   if(ds==demux->audio) fpos=&priv->idx_pos_a; else
 340   return 0;
 341
 342   stream_seek(demux->stream,fpos[0]);
 343
 344 do{
 345
 346   demux->filepos=stream_tell(demux->stream);
 347   if(demux->filepos>=demux->movi_end && (demux->movi_end>demux->movi_start)){
 348           ds->eof=1;
 349           return 0;
 350   }
 351
 352   id=stream_read_dword_le(demux->stream);
 353   len=stream_read_dword_le(demux->stream);
 354
 355   if(stream_eof(demux->stream)) return 0;
 356
 357   if(id==mmioFOURCC('L','I','S','T')){
 358       id=stream_read_dword_le(demux->stream);      // list type
 359       continue;
 360   }
 361
 362   if(id==mmioFOURCC('R','I','F','F')){
 363       mp_msg(MSGT_DEMUX,MSGL_V,"additional RIFF header...\n");
 364       id=stream_read_dword_le(demux->stream);      // "AVIX"
 365       continue;
 366   }
 367
 368   if(ds==demux_avi_select_stream(demux,id)){
 369     // read it!
 370     ret=demux_avi_read_packet(demux,ds,id,len,priv->idx_pos-1,0);
 371   } else {
 372     // skip it!
 373     int skip=(len+1)&(~1); // total bytes in this chunk
 374     stream_skip(demux->stream,skip);
 375   }
 376
 377 } while(ret!=1);
 378   fpos[0]=stream_tell(demux->stream);
 379   return 1;
 380 }
 381
 382 // AVI demuxer parameters:
 383 int index_mode=-1;  // -1=untouched  0=don't use index  1=use (generate) index
 384 char *index_file_save = NULL, *index_file_load = NULL;
 385 int force_ni=0;     // force non-interleaved AVI parsing
 386
 387 void read_avi_header(demuxer_t *demuxer,int index_mode);
 388
 389 static demuxer_t* demux_open_avi(demuxer_t* demuxer){
 390     demux_stream_t *d_audio=demuxer->audio;
 391     demux_stream_t *d_video=demuxer->video;
 392     sh_audio_t *sh_audio=NULL;
 393     sh_video_t *sh_video=NULL;
 394     avi_priv_t* priv=malloc(sizeof(avi_priv_t));
 395
 396   // priv struct:
 397   priv->avi_audio_pts=priv->avi_video_pts=0.0f;
 398   priv->pts_correction=0.0f;
 399   priv->skip_video_frames=0;
 400   priv->pts_corr_bytes=0;
 401   priv->pts_has_video=priv->pts_corrected=0;
 402   priv->video_pack_no=0;
 403   priv->audio_block_no=0;
 404   priv->audio_block_size=0;
 405   priv->isodml = 0;
 406   priv->suidx_size = 0;
 407   priv->suidx = NULL;
 408
 409   demuxer->priv=(void*)priv;
 410
 411   //---- AVI header:
 412   read_avi_header(demuxer,(demuxer->stream->flags & STREAM_SEEK_BW)?index_mode:-2);
 413
 414   if(demuxer->audio->id>=0 && !demuxer->a_streams[demuxer->audio->id]){
 415       mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_InvalidAudioStreamNosound,demuxer->audio->id);
 416       demuxer->audio->id=-2; // disabled
 417   }
 418   if(demuxer->video->id>=0 && !demuxer->v_streams[demuxer->video->id]){
 419       mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_InvalidAudioStreamUsingDefault,demuxer->video->id);
 420       demuxer->video->id=-1; // autodetect
 421   }
 422
 423   stream_reset(demuxer->stream);
 424   stream_seek(demuxer->stream,demuxer->movi_start);
 425   priv->idx_pos=0;
 426   priv->idx_pos_a=0;
 427   priv->idx_pos_v=0;
 428   if(priv->idx_size>1){
 429     // decide index format:
 430 #if 1
 431     if((AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[0])<demuxer->movi_start ||
 432         AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[1])<demuxer->movi_start )&& !priv->isodml)
 433       priv->idx_offset=demuxer->movi_start-4;
 434     else
 435       priv->idx_offset=0;
 436 #else
 437     if(AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[0])<demuxer->movi_start)
 438       priv->idx_offset=demuxer->movi_start-4;
 439     else
 440       priv->idx_offset=0;
 441 #endif
 442     mp_msg(MSGT_DEMUX,MSGL_V,"AVI index offset: 0x%X (movi=0x%X idx0=0x%X idx1=0x%X)\n",
 443             (int)priv->idx_offset,(int)demuxer->movi_start,
 444             (int)((AVIINDEXENTRY *)priv->idx)[0].dwChunkOffset,
 445             (int)((AVIINDEXENTRY *)priv->idx)[1].dwChunkOffset);
 446   }
 447
 448   if(priv->idx_size>0){
 449       // check that file is non-interleaved:
 450       int i;
 451       off_t a_pos=-1;
 452       off_t v_pos=-1;
 453       for(i=0;i<priv->idx_size;i++){
 454         AVIINDEXENTRY* idx=&((AVIINDEXENTRY *)priv->idx)[i];
 455         demux_stream_t* ds=demux_avi_select_stream(demuxer,idx->ckid);
 456         off_t pos = priv->idx_offset + AVI_IDX_OFFSET(idx);
 457         if(a_pos==-1 && ds==demuxer->audio){
 458           a_pos=pos;
 459           if(v_pos!=-1) break;
 460         }
 461         if(v_pos==-1 && ds==demuxer->video){
 462           v_pos=pos;
 463           if(a_pos!=-1) break;
 464         }
 465       }
 466       if(v_pos==-1){
 467         mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI_NI: " MSGTR_MissingVideoStream);
 468         return NULL;
 469       }
 470       if(a_pos==-1){
 471         d_audio->sh=sh_audio=NULL;
 472       } else {
 473         if(force_ni || abs(a_pos-v_pos)>0x100000){  // distance > 1MB
 474           mp_msg(MSGT_DEMUX,MSGL_INFO,MSGTR_NI_Message,force_ni?MSGTR_NI_Forced:MSGTR_NI_Detected);
 475           demuxer->type=DEMUXER_TYPE_AVI_NI; // HACK!!!!
 476           demuxer->desc=&demuxer_desc_avi_ni; // HACK!!!!
 477           pts_from_bps=1; // force BPS sync!
 478         }
 479       }
 480   } else {
 481       // no index
 482       if(force_ni){
 483           mp_msg(MSGT_DEMUX,MSGL_INFO,MSGTR_UsingNINI);
 484           demuxer->type=DEMUXER_TYPE_AVI_NINI; // HACK!!!!
 485           demuxer->desc=&demuxer_desc_avi_nini; // HACK!!!!
 486           priv->idx_pos_a=
 487           priv->idx_pos_v=demuxer->movi_start;
 488           pts_from_bps=1; // force BPS sync!
 489       }
 490       demuxer->seekable=0;
 491   }
 492   if(!ds_fill_buffer(d_video)){
 493     mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI: " MSGTR_MissingVideoStreamBug);
 494     return NULL;
 495   }
 496   sh_video=d_video->sh;sh_video->ds=d_video;
 497   if(d_audio->id!=-2){
 498     mp_msg(MSGT_DEMUX,MSGL_V,"AVI: Searching for audio stream (id:%d)\n",d_audio->id);
 499     if(!priv->audio_streams || !ds_fill_buffer(d_audio)){
 500       mp_msg(MSGT_DEMUX,MSGL_INFO,"AVI: " MSGTR_MissingAudioStream);
 501       d_audio->sh=sh_audio=NULL;
 502     } else {
 503       sh_audio=d_audio->sh;sh_audio->ds=d_audio;
 504     }
 505   }
 506
 507   // calculating audio/video bitrate:
 508   if(priv->idx_size>0){
 509     // we have index, let's count 'em!
 510     int64_t vsize=0;
 511     int64_t asize=0;
 512     size_t vsamples=0;
 513     size_t asamples=0;
 514     int i;
 515     for(i=0;i<priv->idx_size;i++){
 516       int id=avi_stream_id(((AVIINDEXENTRY *)priv->idx)[i].ckid);
 517       int len=((AVIINDEXENTRY *)priv->idx)[i].dwChunkLength;
 518       if(sh_video->ds->id == id) {
 519         vsize+=len;
 520         ++vsamples;
 521       }
 522       else if(sh_audio && sh_audio->ds->id == id) {
 523         asize+=len;
 524         asamples+=(len+priv->audio_block_size-1)/priv->audio_block_size;
 525       }
 526     }
 527     mp_msg(MSGT_DEMUX,MSGL_V,"AVI video size=%"PRId64" (%u) audio size=%"PRId64" (%u)\n",vsize,vsamples,asize,asamples);
 528     priv->numberofframes=vsamples;
 529     sh_video->i_bps=((float)vsize/(float)vsamples)*(float)sh_video->video.dwRate/(float)sh_video->video.dwScale;
 530     if(sh_audio) sh_audio->i_bps=((float)asize/(float)asamples)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
 531   } else {
 532     // guessing, results may be inaccurate:
 533     int64_t vsize;
 534     int64_t asize=0;
 535
 536     if((priv->numberofframes=sh_video->video.dwLength)<=1)
 537       // bad video header, try to get number of frames from audio
 538       if(sh_audio && sh_audio->wf->nAvgBytesPerSec) priv->numberofframes=sh_video->fps*sh_audio->audio.dwLength/sh_audio->audio.dwRate*sh_audio->audio.dwScale;
 539     if(priv->numberofframes<=1){
 540       mp_msg(MSGT_SEEK,MSGL_WARN,MSGTR_CouldntDetFNo);
 541       priv->numberofframes=0;
 542     }
 543
 544     if(sh_audio){
 545       if(sh_audio->wf->nAvgBytesPerSec && sh_audio->audio.dwSampleSize!=1){
 546         asize=(float)sh_audio->wf->nAvgBytesPerSec*sh_audio->audio.dwLength*sh_audio->audio.dwScale/sh_audio->audio.dwRate;
 547       } else {
 548         asize=sh_audio->audio.dwLength;
 549         sh_audio->i_bps=(float)asize/(sh_video->frametime*priv->numberofframes);
 550       }
 551     }
 552     vsize=demuxer->movi_end-demuxer->movi_start-asize-8*priv->numberofframes;
 553     mp_msg(MSGT_DEMUX,MSGL_V,"AVI video size=%"PRId64" (%u)  audio size=%"PRId64"\n",vsize,priv->numberofframes,asize);
 554     sh_video->i_bps=(float)vsize/(sh_video->frametime*priv->numberofframes);
 555   }
 556
 557   return demuxer;
 558
 559 }
 560
 561
 562 static void demux_seek_avi(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
 563     avi_priv_t *priv=demuxer->priv;
 564     demux_stream_t *d_audio=demuxer->audio;
 565     demux_stream_t *d_video=demuxer->video;
 566     sh_audio_t *sh_audio=d_audio->sh;
 567     sh_video_t *sh_video=d_video->sh;
 568     float skip_audio_secs=0;
 569
 570   //FIXME: OFF_T - Didn't check AVI case yet (avi files can't be >2G anyway?)
 571   //================= seek in AVI ==========================
 572     int rel_seek_frames=rel_seek_secs*sh_video->fps;
 573     int video_chunk_pos=d_video->pos;
 574     int i;
 575
 576       if(flags&SEEK_ABSOLUTE){
 577         // seek absolute
 578         video_chunk_pos=0;
 579       }
 580
 581       if(flags&SEEK_FACTOR){
 582         rel_seek_frames=rel_seek_secs*priv->numberofframes;
 583       }
 584
 585       priv->skip_video_frames=0;
 586       priv->avi_audio_pts=0;
 587
 588 // ------------ STEP 1: find nearest video keyframe chunk ------------
 589       // find nearest video keyframe chunk pos:
 590       if(rel_seek_frames>0){
 591         // seek forward
 592         while(video_chunk_pos<priv->idx_size-1){
 593           int id=((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].ckid;
 594           if(avi_stream_id(id)==d_video->id){  // video frame
 595             if((--rel_seek_frames)<0 && ((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break;
 596           }
 597           ++video_chunk_pos;
 598         }
 599       } else {
 600         // seek backward
 601         while(video_chunk_pos>0){
 602           int id=((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].ckid;
 603           if(avi_stream_id(id)==d_video->id){  // video frame
 604             if((++rel_seek_frames)>0 && ((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break;
 605           }
 606           --video_chunk_pos;
 607         }
 608       }
 609       priv->idx_pos_a=priv->idx_pos_v=priv->idx_pos=video_chunk_pos;
 610
 611       // re-calc video pts:
 612       d_video->pack_no=0;
 613       for(i=0;i<video_chunk_pos;i++){
 614           int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 615           if(avi_stream_id(id)==d_video->id) ++d_video->pack_no;
 616       }
 617       priv->video_pack_no=
 618       sh_video->num_frames=sh_video->num_frames_decoded=d_video->pack_no;
 619       priv->avi_video_pts=d_video->pack_no*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
 620       d_video->pos=video_chunk_pos;
 621
 622       mp_msg(MSGT_SEEK,MSGL_DBG2,"V_SEEK:  pack=%d  pts=%5.3f  chunk=%d  \n",d_video->pack_no,priv->avi_video_pts,video_chunk_pos);
 623
 624 // ------------ STEP 2: seek audio, find the right chunk & pos ------------
 625
 626       d_audio->pack_no=0;
 627       priv->audio_block_no=0;
 628       d_audio->dpos=0;
 629
 630       if(sh_audio){
 631         int i;
 632         int len=0;
 633         int skip_audio_bytes=0;
 634         int curr_audio_pos=-1;
 635         int audio_chunk_pos=-1;
 636         int chunk_max=(demuxer->type==DEMUXER_TYPE_AVI)?video_chunk_pos:priv->idx_size;
 637
 638         if(sh_audio->audio.dwSampleSize){
 639             // constant rate audio stream
 640             /* immediate seeking to audio position, including when streams are delayed */
 641             curr_audio_pos=(priv->avi_video_pts + audio_delay)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
 642             curr_audio_pos*=sh_audio->audio.dwSampleSize;
 643
 644         // find audio chunk pos:
 645           for(i=0;i<chunk_max;i++){
 646             int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 647             if(avi_stream_id(id)==d_audio->id){
 648                 len=((AVIINDEXENTRY *)priv->idx)[i].dwChunkLength;
 649                 if(d_audio->dpos<=curr_audio_pos && curr_audio_pos<(d_audio->dpos+len)){
 650                   break;
 651                 }
 652                 ++d_audio->pack_no;
 653                 priv->audio_block_no+=priv->audio_block_size ?
 654                     ((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
 655                 d_audio->dpos+=len;
 656             }
 657           }
 658           audio_chunk_pos=i;
 659           skip_audio_bytes=curr_audio_pos-d_audio->dpos;
 660
 661           mp_msg(MSGT_SEEK,MSGL_V,"SEEK: i=%d (max:%d) dpos=%d (wanted:%d)  \n",
 662               i,chunk_max,(int)d_audio->dpos,curr_audio_pos);
 663
 664         } else {
 665             // VBR audio
 666             /* immediate seeking to audio position, including when streams are delayed */
 667             int chunks=(priv->avi_video_pts + audio_delay)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
 668             audio_chunk_pos=0;
 669
 670         // find audio chunk pos:
 671           for(i=0;i<priv->idx_size && chunks>0;i++){
 672             int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 673             if(avi_stream_id(id)==d_audio->id){
 674                 len=((AVIINDEXENTRY *)priv->idx)[i].dwChunkLength;
 675                 if(i>chunk_max){
 676                   skip_audio_bytes+=len;
 677                 } else {
 678                   ++d_audio->pack_no;
 679                   priv->audio_block_no+=priv->audio_block_size ?
 680                     ((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
 681                   d_audio->dpos+=len;
 682                   audio_chunk_pos=i;
 683                 }
 684                 if(priv->audio_block_size)
 685                     chunks-=(len+priv->audio_block_size-1)/priv->audio_block_size;
 686             }
 687           }
 688         }
 689
 690         // Now we have:
 691         //      audio_chunk_pos = chunk no in index table (it's <=chunk_max)
 692         //      skip_audio_bytes = bytes to be skipped after chunk seek
 693         //      d-audio->pack_no = chunk_no in stream at audio_chunk_pos
 694         //      d_audio->dpos = bytepos in stream at audio_chunk_pos
 695         // let's seek!
 696
 697           // update stream position:
 698           d_audio->pos=audio_chunk_pos;
 699
 700         if(demuxer->type==DEMUXER_TYPE_AVI){
 701           // interleaved stream:
 702           if(audio_chunk_pos<video_chunk_pos){
 703             // calc priv->skip_video_frames & adjust video pts counter:
 704             for(i=audio_chunk_pos;i<video_chunk_pos;i++){
 705               int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 706               if(avi_stream_id(id)==d_video->id) ++priv->skip_video_frames;
 707             }
 708             // requires for correct audio pts calculation (demuxer):
 709             priv->avi_video_pts-=priv->skip_video_frames*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
 710             priv->avi_audio_pts=priv->avi_video_pts;
 711             // set index position:
 712             priv->idx_pos_a=priv->idx_pos_v=priv->idx_pos=audio_chunk_pos;
 713           }
 714         } else {
 715             // non-interleaved stream:
 716             priv->idx_pos_a=audio_chunk_pos;
 717             priv->idx_pos_v=video_chunk_pos;
 718             priv->idx_pos=(audio_chunk_pos<video_chunk_pos)?audio_chunk_pos:video_chunk_pos;
 719         }
 720
 721           mp_msg(MSGT_SEEK,MSGL_V,"SEEK: idx=%d  (a:%d v:%d)  v.skip=%d  a.skip=%d/%4.3f  \n",
 722             (int)priv->idx_pos,audio_chunk_pos,video_chunk_pos,
 723             (int)priv->skip_video_frames,skip_audio_bytes,skip_audio_secs);
 724
 725           if(skip_audio_bytes){
 726             demux_read_data(d_audio,NULL,skip_audio_bytes);
 727           }
 728
 729       }
 730         d_video->pts=priv->avi_video_pts; // OSD
 731
 732 }
 733
 734
 735 static void demux_close_avi(demuxer_t *demuxer) {
 736   avi_priv_t* priv=demuxer->priv;
 737
 738   if(!priv)
 739     return;
 740
 741   if(priv->idx_size > 0)
 742     free(priv->idx);
 743   free(priv);
 744 }
 745
 746
 747 static int demux_avi_control(demuxer_t *demuxer,int cmd, void *arg){
 748     avi_priv_t *priv=demuxer->priv;
 749     demux_stream_t *d_video=demuxer->video;
 750     sh_video_t *sh_video=d_video->sh;
 751
 752     switch(cmd) {
 753         case DEMUXER_CTRL_GET_TIME_LENGTH:
 754             if (!priv->numberofframes || !sh_video) return DEMUXER_CTRL_DONTKNOW;
 755             *((double *)arg)=(double)priv->numberofframes/sh_video->fps;
 756             if (sh_video->video.dwLength<=1) return DEMUXER_CTRL_GUESS;
 757             return DEMUXER_CTRL_OK;
 758
 759         case DEMUXER_CTRL_GET_PERCENT_POS:
 760             if (!priv->numberofframes || !sh_video) {
 761               return DEMUXER_CTRL_DONTKNOW;
 762             }
 763             *((int *)arg)=(int)(priv->video_pack_no*100/priv->numberofframes);
 764             if (sh_video->video.dwLength<=1) return DEMUXER_CTRL_GUESS;
 765             return DEMUXER_CTRL_OK;
 766
 767         case DEMUXER_CTRL_SWITCH_AUDIO:
 768         case DEMUXER_CTRL_SWITCH_VIDEO: {
 769             int audio = (cmd == DEMUXER_CTRL_SWITCH_AUDIO);
 770             demux_stream_t *ds = audio ? demuxer->audio : demuxer->video;
 771             void **streams = audio ? demuxer->a_streams : demuxer->v_streams;
 772             int maxid = FFMIN(100, audio ? MAX_A_STREAMS : MAX_V_STREAMS);
 773             int chunkid;
 774             if (ds->id < -1)
 775               return DEMUXER_CTRL_NOTIMPL;
 776
 777             if (*(int *)arg >= 0)
 778               ds->id = *(int *)arg;
 779             else {
 780               int i;
 781               for (i = 0; i < maxid; i++) {
 782                 if (++ds->id >= maxid) ds->id = 0;
 783                 if (streams[ds->id]) break;
 784               }
 785             }
 786
 787             chunkid = (ds->id / 10 + '0') | (ds->id % 10 + '0') << 8;
 788             ds->sh = NULL;
 789             if (!streams[ds->id]) // stream not available
 790               ds->id = -1;
 791             else
 792               demux_avi_select_stream(demuxer, chunkid);
 793             *(int *)arg = ds->id;
 794             return DEMUXER_CTRL_OK;
 795         }
 796
 797         default:
 798             return DEMUXER_CTRL_NOTIMPL;
 799     }
 800 }
 801
 802
 803 static int avi_check_file(demuxer_t *demuxer)
 804 {
 805   int id=stream_read_dword_le(demuxer->stream); // "RIFF"
 806
 807   if((id==mmioFOURCC('R','I','F','F')) || (id==mmioFOURCC('O','N','2',' '))) {
 808     stream_read_dword_le(demuxer->stream); //filesize
 809     id=stream_read_dword_le(demuxer->stream); // "AVI "
 810     if(id==formtypeAVI)
 811       return DEMUXER_TYPE_AVI;
 812     // "Samsung Digimax i6 PMP" crap according to bug 742
 813     if(id==mmioFOURCC('A','V','I',0x19))
 814       return DEMUXER_TYPE_AVI;
 815     if(id==mmioFOURCC('O','N','2','f')){
 816       mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_ON2AviFormat);
 817       return DEMUXER_TYPE_AVI;
 818     }
 819   }
 820
 821   return 0;
 822 }
 823
 824
 825 static demuxer_t* demux_open_hack_avi(demuxer_t *demuxer)
 826 {
 827    struct MPOpts *opts = demuxer->opts;
 828    sh_audio_t* sh_a;
 829
 830    demuxer = demux_open_avi(demuxer);
 831    if(!demuxer) return NULL; // failed to open
 832    sh_a = demuxer->audio->sh;
 833    if(demuxer->audio->id != -2 && sh_a) {
 834 #ifdef CONFIG_OGGVORBIS
 835     // support for Ogg-in-AVI:
 836     if(sh_a->format == 0xFFFE)
 837       demuxer = init_avi_with_ogg(demuxer);
 838     else if(sh_a->format == 0x674F) {
 839       stream_t* s;
 840       demuxer_t  *od;
 841       s = new_ds_stream(demuxer->audio);
 842       od = new_demuxer(opts, s,DEMUXER_TYPE_OGG,-1,-2,-2,NULL);
 843       if(!demux_ogg_open(od)) {
 844         mp_msg( MSGT_DEMUXER,MSGL_ERR,MSGTR_ErrorOpeningOGGDemuxer);
 845         free_stream(s);
 846         demuxer->audio->id = -2;
 847       } else
 848         demuxer = new_demuxers_demuxer(demuxer,od,demuxer);
 849    }
 850 #endif
 851    }
 852
 853    return demuxer;
 854 }
 855
 856
 857 const demuxer_desc_t demuxer_desc_avi = {
 858   "AVI demuxer",
 859   "avi",
 860   "AVI",
 861   "Arpi?",
 862   "AVI files, including non interleaved files",
 863   DEMUXER_TYPE_AVI,
 864   1, // safe autodetect
 865   avi_check_file,
 866   demux_avi_fill_buffer,
 867   demux_open_hack_avi,
 868   demux_close_avi,
 869   demux_seek_avi,
 870   demux_avi_control
 871 };
 872
 873 const demuxer_desc_t demuxer_desc_avi_ni = {
 874   "AVI demuxer, non-interleaved",
 875   "avini",
 876   "AVI",
 877   "Arpi?",
 878   "AVI files, including non interleaved files",
 879   DEMUXER_TYPE_AVI,
 880   1, // safe autodetect
 881   avi_check_file,
 882   demux_avi_fill_buffer_ni,
 883   demux_open_hack_avi,
 884   demux_close_avi,
 885   demux_seek_avi,
 886   demux_avi_control
 887 };
 888
 889 const demuxer_desc_t demuxer_desc_avi_nini = {
 890   "AVI demuxer, non-interleaved and no index",
 891   "avinini",
 892   "AVI",
 893   "Arpi?",
 894   "AVI files, including non interleaved files",
 895   DEMUXER_TYPE_AVI,
 896   1, // safe autodetect
 897   avi_check_file,
 898   demux_avi_fill_buffer_nini,
 899   demux_open_hack_avi,
 900   demux_close_avi,
 901   demux_seek_avi,
 902   demux_avi_control
 903 };